html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100vh;
    background-color: #fdfdfd;
    display: flex;
    justify-content: center;
    align-items: center;
    user-select: none;
}
body {
    background: linear-gradient(338deg, #4a6d94, #a4c2e0);
}
body::before,
body::after {
    position: absolute;
    z-index: 0;
    content: "";
    display: block;
    border-radius: 50%;
    filter: blur(20px);
}
body::before {
    right: 150px;
    top: 50px;
    width: 180px;
    height: 180px;
    background-color: #4a6d94;
}
body::after {
    width: 80px;
    height: 80px;
    left: 170px;
    bottom: 150px;
    filter: blur(10px);
    background-color: #f7a671;
}

.window {
    position: relative;
    z-index: 99;
    display: flex;
    flex-direction: column;
    width: 1500px;
    height: 800px;
    border: 1px solid #293C4F;
    border-radius: 4px;
    background: linear-gradient(180deg, #6E97C3, #426D9B 30px, #426D9B);
}
header {
    display: flex;
    height: 27px;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px 0 16px;
}
header h1 {
    margin: 0;
    padding: 0;
    font-size: 13px;
    color: #E2EDF7;
    font-weight: normal;
}
.content-wrap {
    display: flex;
    flex-direction: column;
    flex: 1;
    margin: 0 4px 4px;
    background-color: #DBE2E8;
    border-radius: 3px 3px 0 0;
    overflow: hidden;
}
.content-wrap nav {
    height: 38px;
    padding: 3px;
    background: linear-gradient(180deg, #D7EAFB, #B1C7DE);
    border-bottom: 1px solid #65778B;
    box-sizing: border-box;
}

.content-wrap .content {
    display: flex;
    flex: 1;
}
.content-wrap .content aside {
    display: flex;
    flex-direction: column;
    width: 210px;
    background-color: #E6EBEF;
    border-right: 1px solid #929AA2;
}
.content-wrap .content aside section {
    flex: 1;
}
.content-wrap .content aside footer {
    height: 30px;
    border-top: 1px solid #A4B6BE;
    font-size: 12px;
}

.content-wrap .content aside footer ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    border-top: 1px solid #fff;
}
.content-wrap .content aside footer ul li {
    position: relative;
    display: inline-flex;
    height: 30px;
    align-items: center;
    padding: 0  10px;
}

.content-wrap .content aside footer ul li.active::before,
.content-wrap .content aside footer ul li.active::after {
    content: "";
    border: 5px solid transparent;
    border-top: 5px solid #8B9EA8;
    width: 0;
    height: 0;
    position: absolute;
    top: -1px;
    left: 50%;
    transform: translateX(-50%);
}
.content-wrap .content aside footer ul li.active::after {
    border-top-color: #E6EBEF;
    top: -2px;
}

.content-wrap .content .list {
    width: 220px;
    background-color: #FFFFFF;
    border-right: 1px solid #929AA2;
}